Vehicle Key State Control for Automatic Remote Immobilizer

Solution Overview

Problem

The remote immobilizer function in vehicles requires complex user interactions, including requests to a management center, making it vulnerable to relay attacks and complicating its usage.

Innovation Solution

A vehicle control system that automatically determines the state of a key device and sends signals to set or stop the remote immobilizer function, eliminating the need for user-initiated requests to a management center.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a user manually requests setting of the remote immobilizer function through a management center, then the security against relay attacks is improved, but the ease of operation deteriorates due to complicated work requirements

Engineering Contradiction:

Improvesecurity against relay attacksVSAvoidease of operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The key device automatically determines whether to set the remote immobilizer function based on its own state (whether the key device is carried by the user), and autonomously transmits signals to the vehicle and management center without requiring manual user requests. This self-service mechanism maintains high security while significantly improving ease of operation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system performs preliminary determination of the key device state and automatically initiates the immobilizer setting process before the user would need to manually request it. By anticipating the user's needs and pre-evaluating the conditions, the system eliminates the complicated manual request process while maintaining security protocols.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If a manual request process is implemented for setting the remote immobilizer function, then the reliability of the security system is improved, but the productivity deteriorates due to time-consuming user actions

Engineering Contradiction:

Improvereliability of security systemVSAvoidproductivity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The key device automatically determines whether to set the remote immobilizer function based on its own state (whether the key device is carried by the user), and autonomously transmits signals to the vehicle and management center without requiring manual user requests. This self-service mechanism maintains high security while significantly improving ease of operation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system performs preliminary determination of the key device state and automatically initiates the immobilizer setting process before the user would need to manually request it. By anticipating the user's needs and pre-evaluating the conditions, the system eliminates the complicated manual request process while maintaining security protocols.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11731582B2Vehicle control apparatus, vehicle control system, and computer readable recording medium

Publication Date: 2023.08.22 TOYOTA JIDOSHA KK

AI summary

A vehicle control apparatus includes a processor including hardware, the processor being configured to: determine whether or not a state of a key device has reached a predetermined state requiring setting of a remote immobilizer function; and transmit, in a case where the state of the key device has reached the predetermined state, a first signal requesting setting of the remote immobilizer function.